Remove unused HIsNumberAndBranch instruction.

src/mips/lithium-codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2049 matching lines @@
   __ BranchF(chunk_->GetAssemblyLabel(false_block), NULL,
              condition, src1, src2);
 }
 
 
 void LCodeGen::DoDebugBreak(LDebugBreak* instr) {
   __ stop("LDebugBreak");
 }
 
 
-void LCodeGen::DoIsNumberAndBranch(LIsNumberAndBranch* instr) {
-  Representation r = instr->hydrogen()->value()->representation();
-  if (r.IsSmiOrInteger32() || r.IsDouble()) {
-    EmitBranch(instr, al, zero_reg, Operand(zero_reg));
-  } else {
-    ASSERT(r.IsTagged());
-    Register reg = ToRegister(instr->value());
-    HType type = instr->hydrogen()->value()->type();
-    if (type.IsTaggedNumber()) {
-      EmitBranch(instr, al, zero_reg, Operand(zero_reg));
-    }
-    __ JumpIfSmi(reg, instr->TrueLabel(chunk_));
-    __ lw(scratch0(), FieldMemOperand(reg, HeapObject::kMapOffset));
-    __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
-    EmitBranch(instr, eq, scratch0(), Operand(at));
-  }
-}
-
-
 void LCodeGen::DoBranch(LBranch* instr) {
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsInteger32() || r.IsSmi()) {
     ASSERT(!info()->IsStub());
     Register reg = ToRegister(instr->value());
     EmitBranch(instr, ne, reg, Operand(zero_reg));
   } else if (r.IsDouble()) {
     ASSERT(!info()->IsStub());
     DoubleRegister reg = ToDoubleRegister(instr->value());
     // Test the double value. Zero and NaN are false.
@@ skipping 3688 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal